GB1253400A - Remote control system for operation over same audio channel providing voice signals between remote station and base station - Google Patents
Remote control system for operation over same audio channel providing voice signals between remote station and base stationInfo
- Publication number
- GB1253400A GB1253400A GB61419/69A GB6141969A GB1253400A GB 1253400 A GB1253400 A GB 1253400A GB 61419/69 A GB61419/69 A GB 61419/69A GB 6141969 A GB6141969 A GB 6141969A GB 1253400 A GB1253400 A GB 1253400A
- Authority
- GB
- United Kingdom
- Prior art keywords
- base station
- sec
- function
- tone
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000011664 signaling Effects 0.000 abstract 5
- 230000005540 biological transmission Effects 0.000 abstract 4
- 239000003990 capacitor Substances 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
- 230000005764 inhibitory process Effects 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000005236 sound signal Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
- G08C19/12—Electric signal transmission systems in which the signal transmitted is frequency or phase of ac
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mobile Radio Communication Systems (AREA)
- Transmitters (AREA)
- Transceivers (AREA)
- Selective Calling Equipment (AREA)
- Noise Elimination (AREA)
Abstract
1,253,400. Voice frequency signalling; radio signalling. MOTOROLA Inc. 17 Dec., 1969 [20 Dec., 1968], No. 61419/69. Headings H4L and H4R. In a voice frequency signalling system, particularly for controlling the operation of a radio transmitter at a base station from a remote station connected to the base station by a line, a signal from the remote station is preceded by a high level signal of a first frequency for a predetermined duration followed by a signal at a normal level at a different frequency to convey the control information. At the base station the high level signal is detected and prevents the application of signals to the line from the base station. Fig. 1 shows one embodiment in which transmission from the transmitter at the base station of speech originating at the remote station is provided by operating one of the keys 12 to 15, to select the transmitted frequency and then operating the " push to talk " switch 10. Switch 10 triggers 100 m.sec timer 25 which disables a 30 dB attenuator 28 and a muting circuit 30 to allow the output of guard tone oscillator 26 to pass at high level, via mixer 32 and line driver 37, to the line. At the end of 100 m.secs. the attenuator 28 is reinserted, to reduce the guard tone level by 30 dB, and the 25 m.sec. timer 36 is initiated which mutes the guard signal at muting circuit 30 and enables function tone oscillator 34 to transmit a signalling frequency characteristic of whichever of the keys 12 to 15 has been operated. At the end of 25 m.sec. The muting circuit 30 is switched out of operation so that the guard tone is transmitted at a low level, the function tone oscillator is disabled, and speech can be fed over the line from source 27, a filter 29 being provided to remove frequencies at the guard tone frequency e.g., 2175 Hz, to prevent faulty operation of the guard tone detector at the base station. To provide a function other than speech transmission, e.g. changing receivers, aerials or power supplies, controlling transmitter power of receiver squelch level &c., one of the keys 18 or 19 is operated, this energizes the 100 m.sec. timer and causes transmission of the guard tone and a selected function tone in a similar way to the " press to talk " switch, except that transmission of the guard tone ceases after the 100 m.sec. period since the mute circuit is not held off by the manually operated button as it is in the " talk " position. At the base station the received guard tone is detected by detector 40 and causes inhibition of the receiver 46, to prevent the receiver feeding audio signals to the line, and also operates 100 m.sec. timer 42. The timer output enables " and " gate 48 for 100 m.sec. and allows function tones to pass to the detectors 50 to 55 to cause the appropriate function change at the transmitter. Each of the outputs of function detectors 50 to 53 is fed to an " or " gate, the output of which inhibits " and " gate 48 to prevent false operation of a second detector after one has responded. An activity checker 58 is provided which maintains the receiver inhibited and the transmitter functioning while any tones are being received. An automatic gain control system is provided on amplifier 39 which increases the gain thereof on detection of a guard tone so that the guard tone detector remains operated even when the 30 dB attenuator is switched into operation in the guard signal channel at the remote station. In a modification, Fig. 5, a disconnect signal is generated on release of the " push to talk " key or the function key. The disconnect signal is provided by enabling the function tone generator and switching its frequency determining capacitor at 20 m.sec. intervals to frequency modulate the output. The signal is detected at the base station and used to return the system to its original state. Circuits for the signalling system are described with respect to Figs. 3 and 4 (not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US78552668A | 1968-12-20 | 1968-12-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1253400A true GB1253400A (en) | 1971-11-10 |
Family
ID=25135796
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB61419/69A Expired GB1253400A (en) | 1968-12-20 | 1969-12-17 | Remote control system for operation over same audio channel providing voice signals between remote station and base station |
Country Status (8)
Country | Link |
---|---|
US (1) | US3577080A (en) |
JP (1) | JPS5132933B1 (en) |
CA (1) | CA898363A (en) |
FR (1) | FR2026727A1 (en) |
GB (1) | GB1253400A (en) |
HK (1) | HK67876A (en) |
IL (1) | IL33523A (en) |
SE (1) | SE346436B (en) |
Families Citing this family (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2068850A5 (en) * | 1969-10-03 | 1971-09-03 | Cit Alcatel | |
US3701946A (en) * | 1970-12-11 | 1972-10-31 | Duane S Anderson | Device for transmitting and displaying scores on television and radio receivers |
US4019142A (en) * | 1974-08-16 | 1977-04-19 | Wycoff Keith H | Selectively callable receiver operated in accordance with tone characteristics |
JPS5518460Y2 (en) * | 1974-12-24 | 1980-04-28 | ||
US4029901A (en) * | 1975-11-13 | 1977-06-14 | Motorola, Inc. | Control center for a communications system with interchannel patching capabilities |
US4184118A (en) * | 1977-10-03 | 1980-01-15 | Motorola, Inc. | Base station feedback reporting system |
JPS54122625U (en) * | 1978-02-16 | 1979-08-28 | ||
US4208631A (en) * | 1978-06-23 | 1980-06-17 | Motorola, Inc. | Digital pulsed DC remote-control system |
JPS5576367U (en) * | 1978-11-18 | 1980-05-26 | ||
US4455534A (en) * | 1981-10-30 | 1984-06-19 | Motorola, Inc. | Multi-state control circuitry |
DE3144973A1 (en) * | 1981-11-12 | 1983-05-19 | Blaupunkt-Werke Gmbh, 3200 Hildesheim | DEVICE FOR SWITCHING SIGNALS |
US4430742A (en) | 1981-11-20 | 1984-02-07 | Motorola, Inc. | Data muting method and apparatus for radio communications systems |
US4455617A (en) * | 1982-08-30 | 1984-06-19 | Motorola, Inc. | Multiple simultaneous tone decoder |
US4554542A (en) * | 1982-12-10 | 1985-11-19 | Motorola, Inc. | Guard tone capture method |
US4608699A (en) * | 1982-12-27 | 1986-08-26 | Motorola, Inc. | Simulcast transmission system |
US4654881A (en) * | 1984-01-04 | 1987-03-31 | Motorola, Inc. | Remote control system having symmetrical tone, send/receive signaling circuits for radio communications |
US4626984A (en) * | 1984-08-29 | 1986-12-02 | Valmont Industries, Inc. | Remote computer control for irrigation systems |
US5818385A (en) * | 1994-06-10 | 1998-10-06 | Bartholomew; Darin E. | Antenna system and method |
US6397070B1 (en) * | 1999-07-21 | 2002-05-28 | Qualcomm Incorporated | Method and apparatus for estimating reverse link loading in a wireless communication system |
US7046999B2 (en) * | 2003-05-30 | 2006-05-16 | Nasaco Electronics (Hong Kong) Ltd. | Half-duplex wireless audio communication system |
US20050277383A1 (en) * | 2004-06-10 | 2005-12-15 | Reid Jeffrey T | Trunking tone remote adapter and method for using the same |
US8452316B2 (en) * | 2004-06-18 | 2013-05-28 | Qualcomm Incorporated | Power control for a wireless communication system utilizing orthogonal multiplexing |
US7197692B2 (en) | 2004-06-18 | 2007-03-27 | Qualcomm Incorporated | Robust erasure detection and erasure-rate-based closed loop power control |
US8942639B2 (en) | 2005-03-15 | 2015-01-27 | Qualcomm Incorporated | Interference control in a wireless communication system |
US8848574B2 (en) * | 2005-03-15 | 2014-09-30 | Qualcomm Incorporated | Interference control in a wireless communication system |
KR100648926B1 (en) * | 2005-07-11 | 2006-11-27 | 삼성전자주식회사 | Image forming apparatus having function of embedding user identification information into scan data and method thereof |
KR20080068890A (en) * | 2005-10-27 | 2008-07-24 | 콸콤 인코포레이티드 | Method and apparatus for estimating reverse link loading in a wireless communication system |
US8670777B2 (en) | 2006-09-08 | 2014-03-11 | Qualcomm Incorporated | Method and apparatus for fast other sector interference (OSI) adjustment |
US8442572B2 (en) | 2006-09-08 | 2013-05-14 | Qualcomm Incorporated | Method and apparatus for adjustments for delta-based power control in wireless communication systems |
EP2497670B1 (en) * | 2011-03-11 | 2015-07-01 | Johnson Controls Automotive Electronics GmbH | Method and apparatus for monitoring the alertness of the driver of a vehicle |
US9458657B2 (en) | 2011-10-03 | 2016-10-04 | Gbf Corp. | System and method for automatically closing a garage door |
CN110850786B (en) * | 2019-12-03 | 2020-10-16 | 徐汇 | Automatic change equipment remote control system |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2630525A (en) * | 1951-05-25 | 1953-03-03 | Musicast Inc | System for transmitting and receiving coded entertainment programs |
US3316488A (en) * | 1965-12-16 | 1967-04-25 | Telectron Company | Dual modulated remote control transmitter |
US3472965A (en) * | 1966-04-11 | 1969-10-14 | Ped Inc | Time-tone data transmission system |
US3458815A (en) * | 1966-05-17 | 1969-07-29 | Bell Telephone Labor Inc | Constant level signal transmission with band-edge pilot tone amplitude adjustment |
-
1968
- 1968-12-20 US US785526A patent/US3577080A/en not_active Expired - Lifetime
-
1969
- 1969-12-11 IL IL33523A patent/IL33523A/en unknown
- 1969-12-11 SE SE17088/69A patent/SE346436B/xx unknown
- 1969-12-16 CA CA898363A patent/CA898363A/en not_active Expired
- 1969-12-17 GB GB61419/69A patent/GB1253400A/en not_active Expired
- 1969-12-19 FR FR6944243A patent/FR2026727A1/fr not_active Withdrawn
- 1969-12-20 JP JP44102403A patent/JPS5132933B1/ja active Pending
-
1976
- 1976-10-28 HK HK678/76*UA patent/HK67876A/en unknown
Also Published As
Publication number | Publication date |
---|---|
IL33523A (en) | 1972-08-30 |
US3577080A (en) | 1971-05-04 |
HK67876A (en) | 1976-11-05 |
CA898363A (en) | 1972-04-18 |
IL33523A0 (en) | 1970-03-22 |
SE346436B (en) | 1972-07-03 |
JPS5132933B1 (en) | 1976-09-16 |
DE1963678A1 (en) | 1970-11-19 |
FR2026727A1 (en) | 1970-09-18 |
DE1963678B2 (en) | 1974-09-19 |
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